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Leners Patent No. 74,283; me February 11, 18es.

IMPROVEMENT IN DOOR-LOCKS.

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Be it known that I, JACOB BEHEL, of Rockford, in the county of Winnebago, and State of Illinois, have invented.V certain new and useful `Improvements onLocks; and I do hereby' declare that the following is a full, clear, and exact Vdescription thereof, reference being had to the accompanying drawings, making partof thisspec'iiicatiomin whicl1 lFigure 1 is a perspective view of a mortise-lockhavingmy improvements applied'to it.

Figure 2 is a view ofthe interior of the'lock as seen by removing one of thecase-plates. The bolt is-shownV retracted; i 4 A v Figure 3 is asimilar view of the same'parts, showing thc bolt shot out. p Figure4 is a perspective view in'detail of the two Vtumhlers with thebolt and its attachments. Y Figures 5,V 6, and 7, show the bolt and thc several parts immediately connected therewith in.di`erent positions. l p v Similar letters of reference indicate corresponding parts in the several figures p The object of'V this invention is .to so construct locks for doors that theycan -be locked or.unlocked from either sid-e, by using the proper key, precisely like' the `ordinary locks, and, when desired, they can be readily adjusted, so that when locked from one side they cannot be unlocked from the opposite side, thereby producing locks which can he converted fromsimple locks to burglar-proof locks at pleasure, as `will b'e hereinafter described.

To enableothors skilled in lthe art'- to understand my invention, I will describe one practical mode-of carry- -ing it into effect. v

In the accompanying drawings, I have represented my invention applied to a mortise-lock, but do Anot confine myselilto this 'form of lock, as it is applicabla'with slight changes, to other forms and kinds of locks. C represents a rectilinear sliding bolt, which is constructed with a longitudinal recess, g, through its frontoxi locking-end,'witl1 'a slight depression in the end, as shown in igs. r1, 4, 5, and 6. This recess or slot g receives a curved lever, e, which is pivoted to the bolt at c, and projected forward so that its front end can' be moved up or down withfthc fingers.Y The rear upturned end of lever a ispivoted to a latch, d, which is constructed with two transverse studs, d2, onits rear end, and also with forks, dl, projecting down from it, and stridingfthe reduced portion Cl of the bolt. The projections ol1 serve to connect the latch d toV the bolt,`s`o asto prevent lateral displacement, but allow of a free longitudinal movement. The bolt C is provided with two peculiarly-shaped tumblers, D D, both of whieh arel'alike in-shape and' size, asl clearly shown in iig. 4. VOne .tumbler is fitted to work on oneside ofq the bolt, and the other tumbler is applied on the opposite side of the holt, to'woik, at certain times, in harmony with the one first mentioned. The reduced forward portions `of the tumhlers have slots,

D, made through them, which receive studs, C, formedon the sides of the bolt. The rear enlargedportions oi"` the tumblers are constructed with hooked slots, D3, in them for receiving and hooking over ajtixed ledge, E, upon the lock-case, as shown in figs. 2, 5, and 7'. The rear edges of the two tumblers are,curved'conoentrically to their studs C, so that the 'tumblers will play closely about the fixed piece E in locking and unlocking the bolt. A Another slot, notch, or hook, D2, is made in each tumbler for'receiving the `studs d2 upon the rear endofthe sliding latch-piece d, as shown in gs. 2 and 3,.wherein the parts are arranged to be operated, z'. e., locked or unlocked by a key applied to either side of the lock. Thenotches D2 being directly opposite` and in line with each other' when the bolt is shot back, it will be seen that the studs d2, of latch d, will be received by both of `said notches when the lever a is raised, as shown in gs. 2 and 3, but when the'front end of lever a is depressed, ns shown in figs. 5, 6, and 7, the studs' c?" of the latch are moved forward out of the notches D2 in the tumblers. In the iirstinstance mentioned, wherein lever a was described ns being raised, both tumblers will move together about thc axes of their respective studs C, and also move back and forth with the bolt when acted upon by a key. In `the last instance, where the lever vot was described as depressed, the hatching-studs d2 do notrestrain the movement of either oneof the tumblcrs. I

The latch-picce d is held down in' place by means of a spring, h, so constructed and applied to a rear elevatedu portion oi' the bolt as tosnfely arrest thelatch/ when it is in either a forward or backward position.. The tum blers D D are pressed upon by two fork-ed ends of a spring, b, which is'secui'ed to studs, C3, upon the elevated portion of the bolt, as shown in the drawings. This spring b acts at two` points-,forward and in rear of its point of attachment to the bolt, its forward end pressing upon-that portioncf the upper edge ofeach tumbler which is curved out, as shown in gs. 2 and 3. j By this application of the spring, the bolt cannot be casually thrown forward' by the sudden slamming of a door having the lock upon it.

The bolt islarranged centrally over a divisionfguard-plate, Gr, upon the lock-plates or' case, and a'slot is lmade vertically in the rear part of the bolt, on each side thereof, for the key, whieh slot leaves shoulders against which the key actsy to move the bolt back and forth. The key used has a hollow barrel, whichA is received by the'studs z' projecting from both sides 4of-'the fixed guard-plate. `When the key is inserted into the` lock and turned, the latch d being inthe position shown in-gs.,2 and 3, the first'movement will raise both tumblersfrce from the fixed hook E, and the second movement will shoot out, the bolt, as shown in fig. 3.', A reversal ci these lmovements unlocks the bolt and returnsthe tumblers to the position shown in g. 2. When the latch dis in the position just described, the bolt can be movedv by means of the key from either side of the lock-case.

To convert the parts into. azhurglar-proof lock, itis onlyfnecessary to depressthe front end of the lever a,

as showuin igs. 5, 6, and 7, previous to' shootingthe bolt,'which moves forward the latch cl, and leaves the tumblers D'D free to be moved independently of eachother by a key inserted into the lock-case on one side or the other of the guard-plate G. 'A key being inserted on one side ofthe guard-plate G, and turned, the tumbler D von this side ot`the bolt will o'perate with the bolt, but the tumbler on the opposite sideot' the guard or lbolt will remain stationary uponv the holding-piece E, and will be firmly locked down 'in place, so thatv it cannot be raised by a key or other device, by Vmeansfofa projection, C?, of the bolt entering the'recess D3. flligl 6 shows th'e parts as they appear wlienrtliefbolt is shot out by a key inserted on one -side of the guard G, -and iig. 7 shows the parts'as they appear when thebolt is lockedor shot out from the opposite side.

Instead of recessing the rear -sides ofthe bolt, as "shown, for receiving the key, and al1owing,'the'latter to move the bolt by acting directly upon it, the tumblers may be made with recesses for receiving the key, so that the key will operate to move the bolt through the lmedium of the tumblers, thus admitting of the use of more than one tumbler on each side of the lock without increasing-'the size of the'lock.

The lock-case'whieh I have shown vin igs. 2 `and v3, contains a. latch, B, which is so constructed that it can be reversed in the case, and arranged so that its bevelled latching-nose will serve for right or left-hand-'doors. The spring-B1, which presses' out the latcliB, acts upon this-latch through the medium of 4an oscillating-dog, B2, which plays about avstud upon the-loclc-case, and whichv i's pivoted to the latch in front of its rear shoulders, as shown in the drawings. The spindle-hub Jv has a camV projecting from it which works between the shoulder of the latch and the dog B2, so 4that-thelatch can be retracted by turning the hubdeither tothe-right or to the left. This arrangementmakes a very simple and durable latch, and one which is'easily worked.

Having described invention, what I claim, as new,'and desire to secure by Letters Patent, is

1. The application oftulniblers to the bolt-ot' a lock in such manner that while the bolt can be operated from both sides of the lock-ease, this bolt can only be unlocked from that side of the case from which it was locked, substantially as described. I

2. Providing a lock with tumblers and an eXposed-latcli-lever, so arranged that the' bolt can be locked and unlocked from both sides of the lock-case, and, when desired, so adjusted that it can belockedfrom either side of the case, but unlocked only from that side of` the case from which it was locked, substantially as described,

3. -The twin tumblers D D applied to a bolt, C, in combination with'a latching-device which is so arranged that the tumblrs can be connected together or disconnected from each other, at pleasure, substantially as described.

4:. The key-guard Gr with its key-studs 't' arranged centrally with respect to the bolt C and its twin tumblers D D, in conjunction with a device which will admit of said tumblcrs being connected together or disconnected, at pleasure, substantially as described..r

5. The combination of the spring B1, lever B2, and hub J, with the reversible latch 13 constructed and arranged substantially as described.

Moon BEHEL. Witnesses BENJAMIN SNEATH, JAMES Woon. l' 

